Fibrolytic enzymes increase fiber digestibility and growth rate of steers fed dry forages
Fibrolytic enzymes increase fiber digestibility and growth rate of steers fed dry forages
复制标题
DOI：
10.4141/cjas95-096
复制
发表时间：
1995-12-01
影响因子：
1
通讯作者：
Sewalt, VJH
中科院分区：
文献类型：
--
作者：
Beauchemin, KA;Rode, LM;Sewalt, VJH
72头阉牛（289 kg）在添加木聚糖酶（IU）和纤维素酶（FPU）的基础上随意饲喂立方苜蓿干草、立方timothy干草或大麦青贮饲料，比例为1 IU:0.04 FPU。对于紫花苜蓿干草，低、中等水平（900 ~ 4733 IU kg(-1) DM）可使增重提高30% (P < 0.10)，而对于timothy干草，最高水平（12 000 IU kg(-1) DM）可使增重提高36% （P < 0.10）。大麦青贮对酶无反应。纤维分解酶可提高牛的增重，但最佳酶水平取决于饲料类型。
Seventy-two steers (289 kg) were offered ad libitum cubed alfalfa hay, cubed timothy hay, or barley silage supplemented with incremental levels of xylanase (IU) and cellulase (FPU), combined in a ratio of 1 IU:0.04 FPU. For alfalfa hay, low and moderate levels (900 to 4733 IU kg(-1) DM) increased weight gain by up to 30% (P < 0.10), whereas, for timothy hay, the highest level (12 000 IU kg(-1) DM) improved gain (P < 0.10) by 36%. No response to enzymes was observed for barley silage. Fibrolytic enzymes improve weight gain of cattle but optimal enzyme levels depend upon the type of forage.